From: Mike Rapoport <rppt@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andreas Larsson <andreas@gaisler.com>,
Borislav Petkov <bp@alien8.de>, Brian Cain <bcain@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Dave Hansen <dave.hansen@linux.intel.com>,
David Hildenbrand <david@kernel.org>,
Dinh Nguyen <dinguyen@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Guo Ren <guoren@kernel.org>, Helge Deller <deller@gmx.de>,
Huacai Chen <chenhuacai@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Johannes Berg <johannes@sipsolutions.net>,
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Magnus Lindholm <linmag7@gmail.com>,
Matt Turner <mattst88@gmail.com>,
Max Filippov <jcmvbkbc@gmail.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Michal Hocko <mhocko@suse.com>, Michal Simek <monstr@monstr.eu>,
Mike Rapoport <rppt@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Richard Weinberger <richard@nod.at>,
Russell King <linux@armlinux.org.uk>,
Stafford Horne <shorne@gmail.com>,
Suren Baghdasaryan <surenb@google.com>,
Thomas Gleixner <tglx@kernel.org>,
Vineet Gupta <vgupta@kernel.org>,
Vlastimil Babka <vbabka@suse.cz>, Will Deacon <will@kernel.org>,
linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev,
linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org,
linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org,
sparclinux@vger.kernel.org, linux-um@lists.infradead.org,
linux-mm@kvack.org, x86@kernel.org
Subject: [PATCH v2 0/4] arch, mm: consolidate empty_zero_page
Date: Mon, 9 Feb 2026 16:40:53 +0200 [thread overview]
Message-ID: <20260209144058.2092871-1-rppt@kernel.org> (raw)
From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
Hi,
These patches cleanup handling of ZERO_PAGE() and zero_pfn.
v2 changes:
* add patches that cleanup zero_pfn code a bit (patches 1,2)
* add a patch that caches struct page for empty_zero_page (patch 4)
* use uint8_t instead of unsigned long for empty_zero_page
* fix sparc64 changes in patch 3
v1: https://lore.kernel.org/all/20260124095628.668870-1-rppt@kernel.org
Mike Rapoport (Microsoft) (4):
mm: don't special case !MMU for is_zero_pfn() and my_zero_pfn()
mm: rename my_zero_pfn() to zero_pfn()
arch, mm: consolidate empty_zero_page
mm: cache struct page for empty_zero_page and return it from ZERO_PAGE()
arch/alpha/include/asm/pgtable.h | 6 ---
arch/arc/include/asm/pgtable.h | 3 --
arch/arc/mm/init.c | 2 -
arch/arm/include/asm/pgtable.h | 9 -----
arch/arm/mm/mmu.c | 7 ----
arch/arm/mm/nommu.c | 7 ----
arch/arm64/include/asm/pgtable.h | 7 ----
arch/arm64/mm/init.c | 5 +++
arch/arm64/mm/mmu.c | 7 ----
arch/csky/include/asm/pgtable.h | 3 --
arch/csky/mm/init.c | 3 --
arch/hexagon/include/asm/pgtable.h | 6 ---
arch/hexagon/kernel/head.S | 5 ---
arch/hexagon/kernel/hexagon_ksyms.c | 1 -
arch/loongarch/include/asm/pgtable.h | 9 -----
arch/loongarch/mm/init.c | 3 --
arch/m68k/include/asm/pgtable_mm.h | 9 -----
arch/m68k/include/asm/pgtable_no.h | 7 ----
arch/m68k/mm/init.c | 9 -----
arch/m68k/mm/mcfmmu.c | 2 -
arch/m68k/mm/motorola.c | 6 ---
arch/m68k/mm/sun3mmu.c | 2 -
arch/microblaze/include/asm/pgtable.h | 10 -----
arch/microblaze/kernel/head.S | 4 --
arch/microblaze/kernel/microblaze_ksyms.c | 2 -
arch/mips/mm/init.c | 11 +-----
arch/nios2/include/asm/pgtable.h | 7 ----
arch/nios2/kernel/head.S | 10 -----
arch/nios2/kernel/nios2_ksyms.c | 1 -
arch/openrisc/include/asm/pgtable.h | 4 --
arch/openrisc/kernel/head.S | 3 --
arch/openrisc/kernel/or32_ksyms.c | 1 -
arch/openrisc/mm/init.c | 3 --
arch/parisc/include/asm/pgtable.h | 11 ------
arch/parisc/mm/init.c | 6 ---
arch/powerpc/include/asm/pgtable.h | 6 ---
arch/powerpc/mm/mem.c | 3 --
arch/riscv/include/asm/pgtable.h | 7 ----
arch/riscv/mm/init.c | 4 --
arch/s390/mm/init.c | 4 +-
arch/sh/include/asm/pgtable.h | 8 ----
arch/sh/include/asm/setup.h | 3 +-
arch/sh/kernel/head_32.S | 4 +-
arch/sh/kernel/sh_ksyms_32.c | 1 -
arch/sh/mm/init.c | 1 -
arch/sparc/include/asm/pgtable_32.h | 8 ----
arch/sparc/include/asm/pgtable_64.h | 3 --
arch/sparc/include/asm/setup.h | 2 -
arch/sparc/kernel/head_32.S | 7 ----
arch/sparc/mm/init_32.c | 4 --
arch/sparc/mm/init_64.c | 24 +++++-------
arch/um/include/asm/pgtable.h | 9 -----
arch/um/include/shared/kern_util.h | 1 -
arch/um/kernel/mem.c | 16 --------
arch/um/kernel/um_arch.c | 1 -
arch/x86/include/asm/pgtable.h | 8 ----
arch/x86/kernel/head_32.S | 4 --
arch/x86/kernel/head_64.S | 7 ----
arch/x86/kvm/mmu/spte.h | 2 +-
arch/xtensa/include/asm/pgtable.h | 4 --
arch/xtensa/kernel/head.S | 3 --
arch/xtensa/kernel/xtensa_ksyms.c | 2 -
fs/dax.c | 2 +-
fs/proc/vmcore.c | 2 +-
include/linux/pgtable.h | 48 ++++++++++++++---------
mm/huge_memory.c | 2 +-
mm/memory.c | 15 +------
mm/migrate.c | 2 +-
mm/mm_init.c | 28 +++++++++++++
mm/userfaultfd.c | 4 +-
70 files changed, 86 insertions(+), 354 deletions(-)
base-commit: 50c7f34c5c7403a12003c6759f6f6ca9a5a10872
--
2.51.0
next reply other threads:[~2026-02-09 14:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-09 14:40 Mike Rapoport [this message]
2026-02-09 14:40 ` [PATCH v2 1/4] mm: don't special case !MMU for is_zero_pfn() and my_zero_pfn() Mike Rapoport
2026-02-09 14:40 ` [PATCH v2 2/4] mm: rename my_zero_pfn() to zero_pfn() Mike Rapoport
2026-02-09 15:08 ` Christophe Leroy (CS GROUP)
2026-02-10 14:50 ` Mike Rapoport
2026-02-10 14:52 ` Lorenzo Stoakes
2026-02-10 15:11 ` Mike Rapoport
2026-02-09 14:40 ` [PATCH v2 3/4] arch, mm: consolidate empty_zero_page Mike Rapoport
2026-02-09 15:20 ` Dave Hansen
2026-02-10 15:00 ` Catalin Marinas
2026-02-09 14:40 ` [PATCH v2 4/4] mm: cache struct page for empty_zero_page and return it from ZERO_PAGE() Mike Rapoport
2026-02-10 15:06 ` Catalin Marinas
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